层叠体
By optimizing the laminate of the polyimide film and the protective film, the problems of uneven peeling of the protective film and unstable peeling of the polyimide film were solved, achieving uniform peeling of the protective film and stability of the polyimide film, thus ensuring the good appearance and processability of the functional components.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- TOYOBO CO LTD
- Filing Date
- 2020-12-01
- Publication Date
- 2026-07-17
AI Technical Summary
When forming functional elements on a polyimide film, uneven peeling of the protective film and peeling instability of the polyimide film after storage lead to appearance defects such as scratches and wrinkles, as well as problems with the formation of functional elements. Furthermore, the low molecular weight components in the protective film may cause reduced adhesion and whitening after contact with the polyimide film.
A laminate of a polyimide film and a protective film is used. The polyimide film has a yellow index of less than 10, a light transmittance of more than 70%, and a CTE of -5ppm/℃ to +55ppm/℃. The solvent-extracted low molecular weight components in the protective film are controlled at 0.03 to 3.0% by mass, and the peel strength is above 0.06 N/cm and below 0.25 N/cm. A 90-degree peeling method is used.
It achieves uniform peeling of the protective film, avoids scratches and wrinkles on the polyimide film, maintains low peel strength stability after long-term storage, avoids reduced adhesion and whitening, and ensures good appearance and processability of functional components.
Smart Images
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